Hello all
I have a '92 7.3 that doesn't smoke at all except for some blue smoke in certain conditions. Mileage 153K. Original IP and injectors as far as I can tell (purchased truck at 150K). The blue smoke is only during shifting, coasting in gear at 50+mph in 5th, or when maintaining speed at higher RPM (2k+) . When maintaining speed at higher RPM, it's almost like the engine is sputtering a little...noticeable vibration in the cab. Vibration goes away at speed when mashing throttle, coasting, or when putting in the clutch.
My guess is that it's probably the IP or injectors, but can some of you please confirm my thinking. Anything else that I should look at? I replaced the CDR with a new one at 151K. Blue smoke usually indicates burning oil but it should be nearly constant if it's a bad seal or something...
I have a '92 7.3 that doesn't smoke at all except for some blue smoke in certain conditions. Mileage 153K. Original IP and injectors as far as I can tell (purchased truck at 150K). The blue smoke is only during shifting, coasting in gear at 50+mph in 5th, or when maintaining speed at higher RPM (2k+) . When maintaining speed at higher RPM, it's almost like the engine is sputtering a little...noticeable vibration in the cab. Vibration goes away at speed when mashing throttle, coasting, or when putting in the clutch.
My guess is that it's probably the IP or injectors, but can some of you please confirm my thinking. Anything else that I should look at? I replaced the CDR with a new one at 151K. Blue smoke usually indicates burning oil but it should be nearly constant if it's a bad seal or something...